When in doubt, I always counsel patients to use less of any med cannabis product. I might start off with half of the patch and see how this reacts with you. CBD is less psychoactive than THC but it still has some psychoactivity, in my experience. Another option is to try med cann topical lotions with a similar CBD:THC ratio and cannabinoid dosage as the patch (or, creams or other preps) in a low dose/ small application and see how you react to that. Keep in mind that there might be a slightly increased risk of falls (at least in my experience) so be mindful of this especially if other medications that might cause orthostatic hypotension, dizziness, balance issues are also being administered. Be safe and well!